Stoneworking-machine.



WJ. MEYBRS. STONEWORKING MACHINE. APPLIUA'ION FILED DEO: 5. 1908.

Patented May 28; 1912.

unirsi). sraras VParana? ons wrLmD' F. Maynas, 0F NEWXORK, N.,Y.

sroNEwonnmG-mscnmn.

Specication of Letters Patent. -PatentedvMa-y 28, 1912,

.Anni-mation tiled December 5,1908. Serial No. 466,064.

To all whomz'tvmay concern:

Be it .known-that AI, warm F. MEYER@ a citizen of the United States, resid-ingat Long Island City, borough of Queens, city l of New York, in the .county of Queens and 'State of New York, have invented a certain new and useful Improvement in Stonework- Y. ging-Machines, of which V.the following is a specification,- reference, being had therein tov v My invention includes means for regulat-v ing the pressure on thegrinders, and also means for automatically lifting the grinders from one stone to another of a diierent thickness; and my invention further includes means 'for limiting and regulating the depth-of cut of the grinders.

My invention also includes a stationary table and means for feeding the ygrinders in ,two`dir ec tl'ons rela-tively to thetable, such grinders 'rotating in planes substantially parallel with the faceof the table.

My inventionalso' includes other advantageous features and detailsof construction,

as will hereinafter appear. VVhi'le my present invention more particularly directed to they devices for eifecting vthe grinding and polishing-operations, as a matter of great convenience,A I have embodiedin one machine, in 'addition to the: grinding devices,'a"reversible head carrying.v

jointing saws set at different angles, for `cutting thestone in different directions.

Il shall "now describe an embodiment of my invention with referene to the accompanying drawingsand' shall thereafterpoint out my' invention in 'claims.

' Figure 1 is a planl vlew; with parts broken v away, of a machine-'embodying my invenbroken away. Fig.'-3 is yan end elevation,l partly in section,l as viewed from the right Beyer rigs. rende; Figi.; is. an enlarge@ aetion. Fig. 2-is a sideelevatmn, partly l l Y tail view showing a locking device for l-imiting and regulating the depth of cut of the grinders, as viewed from the right of Eig. 3. Fig. 5 isa vertical section on planes indicated by the line 5-5 of Fig. l, looking upward. Fig. 6 is an elevation of the jointing saw head and vcarriage as -viewed from the left of Figs. 1, 2 and 5, and as viewed from the rear of Fig; 3, portions of the frame also beiiig shown.- Fig. 7 is an elevation of the supporting carriage for the jointing saw head and its immediate adjuncts,

ion.

the jointing saw head being removed.' Fig.

8 lis a sectional plan on a plane indica-ted by the line 8-8'of Fig. 2, portions being omitted. Fig. 9 is an elevation of a portion of thegrinder head supporting carriage-and its immediate adjuncts, including particularly portions of the feeding mechanism.-

Fig. 10 is an enlarged vertical section on'aplane indicated by the line 10-1O of Fig.' 2,

as viewed from the left, portions being broken away. Fig. l1 is a horizontal section on a plane indicated by the line 11-11 of Fig. 10.

The illustrated embodiment of the inven-y tion comprises a plurality of grinders mounted to rotate in horizontal planes, feeding mechanism for'fe'eding the grinders in two directions over a stationary worksupporting table, means actuated by the feedvinginechanism for automatically lifting the grindersfrom one piece of. work to another, combi-ned countebalancing and pressure augmenting, weights for the grinders, and an adjustable locking device for determining the maximum depth of cut of the grind-` ers. Also two jointing saws are provided and are set in planes substantially zit-right i' angles, and the joint-ing saws are mounted on a swivel head so as to bring either ofthe .sawsinto operative position relatively tothe worln'for ciitting the stone either longitudinally or transversely as desired, means being provided for `feedinglthe saws according Y tovthe'direction of the cut to be made.

The work isfs'up'ported on a substantially horizontal bed or work-supporting table 13 above which the grinders 14 are hung. The

\ grinders 14 are for .'grinding, surfacing and- 'v ders being /10 5v polishing, four 4of such shown inthe drawings. Thesegrinders 14 areinounted on vertical shafts 15 journaled. in shaft harnggersF o r shaft bearingsl, and

the shafts l15vare free to moveverticallygin the-aaneen foi permittingthe grinders to rest upon and be pressed againstthe work.v Means are provided for regulating the pressure on the grinders, that is, for varying the force with which the grinders are' pressed toward the' 4vork.` Forincreasing and for decreasing the pressure on the grinders. substantially horizontal 'levers 17 are provided and have fulcriiin pivots supported by depending brackets or supports 1S, extending from the,` shaft. hangers 16. The levers 1T are pivoted tosthe grinder shafts 15, so as to' partake of the vertical movement of the shafts, by means of rota tively loesefcol'lars 19- which are prevented' from sliding longitudinally on the shafts 15 by fixed collars Q and have a slotted pivotal connection with the le-vers 17, as shown in Figs. Q and Arms of the levers 17 eX- teiid forward some distance from the shafts and other aiins of these levers ext-end rearwardly from the fulcrum pivots of t-he levers, and weights 21 are provided and are v applicable to or may be adjusted to either the front arms or to the rear arms of the levers and are slidable along the levers toward and away from the fulcriiin pivotsf0r faryiiig the pressure of the grinders 14 on the work. The weights Q1 are shown` as held iii adjusted position by set screws 1:2 (Figs. 1,2, 3 and 5), indentatiens or recesses 12 (F 2 and 5) being shown as provided in the lever arms for receiving the ends of the set screws, In the drawings the weights 21 are shown as applied to the forward or outer ends of the levers 17, and-when the weights 21 are in this position they augment the pressure of the grinders 14 on the work, that is to say, the downward pull of the vweights Q1 may be placed oiitl'ie rearwardly eXtending aii'i'is of the levers 17 and iii this position r of adjustment the weights 21 -'will exertia lifting oi."`counterl' alaneiiig effect on `the' grinders 1st, and the couiiterbalancing effect may be regulated by adjusting the weigl'i-ts along the lever arms. Piy thus partially couiiterbalancing the vgrinders to a .greater or less extentV the .pressure of Vthegrinders on the work may be decreased or lessened. tol

any desired amount and maybe rendered ever so slight, so as to be suitable for fine polishing oj'ierations.. l

To regulate the depth ofleut of the grinders cani toes are splined on a rockshaft vers 17, regardless of the feeding or adjust.

ment ofthe shaft hangers 16 4longitudinally to the rock shaft -The depth of` cutY of the grinders 14e may be varied by rotating the rock shaft Q3 and locking the same'in4 the desired position. The rock shaft 23 is supported in downwardly extending branle ets 2l, extending from a cross frame 39, and at one end, shown in the,- dra\vings(Fig. 3) as at the right side of the machine when viewed from the front, is provided with a hand lever for rocking the shaft 4To retain the rockshaft 93 in any position to which it iiiay be rocked this shaft. is pro-- vided with -a limiting larm, 26 which is adapted-.to engage with a stop pin 27 carried by Aa regulating `disk 28 rotatably mounted on the shaft; 23 and adapted to be held in adjusted 'position by athumb nut 29 screwed on a stud'SO projecting from one ofthe supporting brackets 2st through a slot 31 in the disk Q8 particularly Fig. 4). By

the means described the depth of cut of theA grinders 14 `may be regulated so as to cut down to a predetermined level or plane and to go no dee-per, and in thisyway a4 uniformly smooth plane surface may be` produced. l i

The grinders 14, levers, 17 and shaft `hangers-'1G are supported by a cairiage 32.

The shaft hangers 16-are attached tothe carriage 32 by bolts Seiigaging in T-shaped slots extiriiding the length ofthe carriage 32. This construction permits the adjust-` ment of the hangers l6,`to`gether with the grinders lll, to different distances apart, vby sliding the bolts to different locations `along the slots, 'and also, by the same means., perf mits vthe `employment yof a greater 0r` less number of grinders, as desired.I

j are provided rwith sleeves 35y (shownindotted lines iiil Fig. joiirn'aled in lthe upper parts of the liaiigers 1G andlhavingaasindicated, a splincd connection with the actuating shafts 15 of the grinders 14 so as rto `permit. actuation of the'grinders without regard to their vertical niover'ne'nt relativelyy to Ythe shaft'liaiigers16. The gears 34 areh adapted to be rotated by bevel gears `36y pro"- vided with flanged sleeves 37 journaledI in' brackets shown as foriiiedi'iitegiral with anc extending upwardly fro'm the shaft hangers 16.' Allvof the gears 36are splined ony Aa.-

,single driving shaft 38, so as to permit aetu` ation of the grinders liwvitliout regard tol the adjustment of 4 the shaft hangers 16 `along the carriage 32 or to fthe feedingof the carriage 32, together with the grinders,

longitudinally to the actuating shaft 38.

The carriage 32, together with the parts carried thereby. `is arranged to have a reciprocatory feed movement transversely to ,forth across the. work at substantially an even frate of movement, so as to substantially equalize the grinding and polishing operations at different pointsof the feed movement. To effect this feed movementa pitman or connecting rod 40 connects the' carriage 32 with a crank 41 fixed on a short shaft 42, as 'appears most clearly in Fig'. 9. The. shaft 42 also has fixed thereon an elliptical gear wheel43 which meshes with and lis driven by another elliptical gear wheel 44 in such manner asto carry the crank 41 quickly over the deadv center and to compensate for the differences' in rectilinear movement caused by the angular movement of the crank. The elliptical gear wheel 444 is fixed on a shaft 45 on which is also fixed a Worm wheel 46engaged'by a worm 47 carried on'a feed shaft 48. The feed shaft 48 is connected with the driving shaft 38,

' to be rotated thereby, by a sprocket chain 49 engaging sprockets 50 and 51. The driving shaft 38 issupported on the frame 39 in bearings 52, and the feed mechanism just described is supported by a bracket 53 se cured to the frame 39. The driving shaft 38 is shown as arranged to beactuated by an electric motor 54 mounted on the frame 39 and connected to the shaft 38 by bevel gears 55 and 56, the latter gear being fixed on the driving shaft 39.

Means arevprovided for raising and loweringithe grinders 1.4 through a considerable range of movementfso as to bring them to the proper height to act on stones of considerable difference in thickness supported on the table 13, and this vertical'adjustment is effected by moving the frame 39 vertically. To permitV of this adjustment the grinder carrying frame 39 is mounted to slide vertically on a main supporting frame 57 and is guided thereon by flanges as shown in the drawingsV (see particularly Fig. 8),

land to effect this vertical adjustment lifting screws 58 are journaled on the main frame 57 and have screw-threaded engagement with opposite ends of the grinder-carrying 'Emme 39. These liftingscrews- 58 are of lhetsamepitch and arerconnected together,

The carriage 32 isto be operated in unison at the same rate -so that thef-rame 39 may be adjlusted up and down with an equal and vpara lel movement of all its parts. To actua-te the lifting .screws 48 in this manner, these screws are connected together and adapted to be actuated by a transverse shaft 59 journaled on the main frameTand geared .to the lifting screws 58 by wormgears as shown in the drawings. The weight of the frame 39 .and of the mechanisms'earried thereby is supported 4by the lifting screws '58. Desired vertical adjustment'may be manually .effected by means of a groovedpulley wheel`60 fixed on one end of the'adjusting shaft y59 and engaged by a hand rope 61.

In addition to the reciprocatory feed movement of the grinders 14'transversely Iof the table 13, means are provided to feed the grinders longitudinally .of the` :table 13,

and this longitudinal feed movement of the grinders is effected by feeding the' main frame57 longitudinally of the table 13. vBy lfeeding the mainframe of the machine along a stationary table or'workv-supportng bed, it is obvious that the machine cam be- 0perated in one-half the space thatwould be required if the work-supporting bed orl table were fed past a stationary main frame, or else for the same space the stationary table may be of twice the capacity lof a table that has a feed movement. The main frame 57 is supported and guided in V guides kor ways formed in side rails 62 shown as secured by bolts to the bed 13, and'is held in place on the rails by toes 63engaging under overhanging port-ions of the table as shown. Provision is made for taking up `wear lby raising the Arails 62 by means of' screws 64 screwing into bosses 65 formed on base flanges extending from the bed 13.

The main frame57 is fed along the rails-62 7 by longitudinally arranged feed screws 66 journaledin, vstationary bearing blocks 67.. The feed screws 66 pass through andl have screwfthreadedf engagement with nuts 68 (see particularly Figs. 10 and 11)v embraced and held by collars 69 held between portions of the main frame 57 forming abutments, as seen most clearly in. Fig. 2.` The nuts 68 vhave formed thereon worm gears 70,'.Which also act as thrust bearings for the collars 68, additional thrust bearingsv being provided by' annular ribs on the nuts engaging in grooves inthe collars (Fig. 11). l

It is.evident that themain frame 57 mayl be fedalong the rails 62 'either byrotating the nuts68 orvby rotating the screws l66.

To impart the necessary feed movementein the operation of the machine, means are pro-- vided for rotating the vnuts 68 at the proper j;l

.rate while the screws 66remain stationary,

andto move the grinders quickly from one piece of work to'another or from one partA .of the work to' another part, means are. pro-e150 r vided for rapidly rotating thek feed screws 66 without rotation of the nuts 68.

'The .means for rotating the nuts 68, to

Afeed'the grinders -14 longitudinally of the table 13, will be first described. The worm gears 70 are engaged by worms 71 formedl atthe lower ends of vertical .sleeves 7 2 journaled in t-he main frame 57. Vertical shafts 73 and 74, journaled at their lower e'nds in the worms 71 and sleeves 72 and journaled at their upper ends in the 'main frame 57,`

are adapted to be connected respectively with the sleeves 72 by ordinary tooth clutches 75 to rotate the worms`71. The upright shafts 7 3 and 74'are geared to a cross shaft 76 j ournaled in bearings on top of the main frame 57. Two bevel .gears 77 and 78 are loosely mounted on the cross shaft 76 between two of its bearings and are rotated 1n opposite directions by a bevel pinion 79 carried on t-he motor shaft of an electric mo- The means for rapidly rotating the feedscrews 66, toquickly rmove the main frame l track91 supported on one. of the side rails 62.

A lifting cam or cam block 92 is arranged in 57 and mechanisms carried thereby, com. prise af connecting shaft 82 geared to the' ends of the screws 66 and passing loosely through two bevel gears 83 and 84 both engaged by a bevel pinion 85 direct-ly rotated by an electric motor 86. A tooth clutchl 87 of, ordinary form is Iarranged between the gears 83 and 84 so as to engage either one or the other of these gears with the coni n'ecting shaft 82, so that the shaft 82 may `be rotated in either direction, to move the main frame 57toward either end of the table 13.

-Different `parts of the work or different pieces of work supported on the table 13 sometimes have their upper sides or upper surfaces at different levels, and means are provided for lifting thegrinders 14 fromA one location on .the work and for letting them down again` at another locationl on the work, and such means' are arranged to be actuated automatically as the-main frame 57 is moved over the table 13. A vertically arranged push rod 87 is guided in the main frame 57 and is provided -at its upper'end with a lifting toe 88, which engages beneath an arm 89 fixed on thel adjacent end of the rock shaft 23v andextending on the opposite side of the rock shaft from the cam toe 22. The lower end of the push rod 87 carries a roller 90, which, as the mainframe 57 moves along the rails 62, is arranged to travel along` a the path of the roller 90 and is adjustable along the track 91 by means of set screws, as showninthe drawings (Figs. 2 and 3). The lifting cam 92 'is provided with opposit-ely inclmed faces, as shown, and when the roller 90 rides over the lifting cam the push rod 87 will be actuatedto rotate the rock shaft 23 so as to depress the cam toes 22 against the rearwardly extending arms of the levers 17 and thereby raise the grinders 14; and as the roller 90 travels down the oppo` site inclineof the lifting cam, the grinders 144 will be graduallylet down again at a new location y0n the work which may be 'at a higher orat a lower level. It is ob- -vious that as many lifting. cams 92 as d esired may be employed at different locations along` the track 91.

Means' have been described for grinding and polishing thesurfaces of stones, 'and the means embodied in the same machine for cutting t-he stones both in a lengthwise and in a crosswisedirection will nowbe described. A joint-ing saw' 93 is provided for cutting the stone lengthwise or longitudi- Saw 94 is provided for cutting the stone crosswise or transversely of the table 13, and ymeans are provided for bringing either ofthese 'saws into operative relation with the work supported on the table. The jointingsaw 93 isiarranged parallelwith `9()- nally of the table y13, and another jointingv the length of theI table 13 and is mounted on a stub shaft 95' journaled in a shaft hanger 96 vertically adjustable in dovetail guides or'waysv 97 onr a' reversible swivel head 98.` Adjustment of the shaft hanger 96 relatively to the swivel head 98'is effected by means of a screw 99 (Fig. 6) journaled inI bearings on. the swivel heard as shown and having screw-threaded engagementwith a lug 100 carried by the shaft hanger96, and arranged to bc actuated by bevel gears 101 and a hand wheel ,102. i

The jointing saw 94 is arranged crosswise of the. table 13 and in planes substantially aty right angles to the other lioint'ing saw 93. The jointing saw 94 is mounted on a stub shaft 103 journaled in the opposite end of the shaft yhanger 96I and which, in the positions `of the parts as illustrated in the drawings, is the upper end of the shaft hanger. The shaft hanger 96 is reversible end for end to bring either the one or the other of the jointing saws into lowermost position and into operative relation to the work supliorted on the table 13, and to thus reverse the position of the shaft hanger 96 the swivel head 98, on which the shaft hanger 96 is mounted, is reversed in ponular T-slot in by bolts 105 v (Fig. 6), engaging in an anthe carriage 104 outside of and concentric with the -annular guide groove. `It is evident that the adjusting screw 99 serves as well for thejointing saw 94 as for the-jointing saw 93.

To actua-te the jointing saws 93 and 94, the, jointing sawy shafts 95 and 103 are gea-red, by bevel gears 106 and 107, to alined shafts108 and 109- journa-led in the shaft hanger 96 and lpassing loosely through flanged sleeves 110 and 111 journaled in the swivel head 9K8, the vertical shafts 108 and 109 being provided with fixed thrust collars 112 and 113. The sleeves 110 and 111 vcarry bevel gears 114 and`115, respectively, and bothv ofA` these bevel gears are engaged by a bevel gear 116 having a sleeve portion journaled concentrically in the swivel head 98, so that the bevel gear 116 is vadapted to drive either of the j'ointing saws l93 or 94.

To actuate the saws" 93 andI 94, the alined' shafts 108 `and 109 vmay be engaged, with the sleeves 110 and-.111, respectively, to be rotated thereby, by ordinary tooth clutches 117 and 118.splined on the shafts 108 and 109, respectively, to pern'iit ractuation of j the jointing saws without regard to their' i gear 116 and is connected therewith by a connecting shaft 120 (Figs. 6' and 7). The bevel "gear119 is. actuated by a bevel gear 121 shown as formed with ,a flanged sleeve journaled in the carriage 104 `(Fig. 8), and' the gear 121 is shown as having a splined connection with a horizontal jointing saw driving yshaft 122, so as to permit actuation of Ithe jointing saws without regard to movement of the carriage 104 longitudinally to the driving shaft122.

- The carriage104, together with the joint.

-ing saws carried thereby, is arranged to- -crosswise have horizontal feed movements both crosswise and longitudinally of the work-supporting bed or table 13. To permit of the feed, the carriage 104 is mountedv to slide longitudinally on a horizontal cross frame 123.. The carriagev104 is held iny `place andguided' on the franie.123 by dove= tail gibs on the carriage which engage with dovetail ways on the frame', as shown` in the drawings (see Fig.. 5). To feed the carriage 1.04 along the ways longitudinally of the frame 123, a feed screw 124` is journaled at its ends in the frame' 123, extending fromy and` to end of. such frame, and has' 1screw-threaded engagement withV the' carriage 104 (Fig. 5). 'A screw-actuating spur gear-125 isv loosely mounted -on one end? of the feed screw 124; and is adapted to be en gaged with or connected with such feed screw and disconnected` therefrom by an ordinary tooth clutchv 126. The gear 125y is engaged by a pinion 127 carried? by thev adjacent end of the jointingv saw actuating shaft 122, this shaft' extending.' the' lengtlrA of the frame 123 1n parallel relation to the feed screw 124 and being. journaled at its ends in the frame 123. The end' ofthe feedV screw 12.4,y outward from theV clutch 126,., is-

squared, as shown, for the attachmentofy a crank t'o adjust the carriagey 104 alongA thel frame 123 independently of the feed movement' of the carriage.

Tor accommodate work at different heights? .or of different thicknesses, the jointing, saw

supporting cross frame 123V may beraised@ and lowered or vertically adjusted through a considerable distance, andl to permit of this?v adjustment the frame 123 is mounted tol slide vertically 'on' the main supporting frame 57 and is guided thereon by flanges (Fig. 8) similarly to the grindersu-pporting frame '39. This vertical adjustment is effected'by lifting screws 128 journaled on' theA main frame 57 and having screw-threaded engagement with opposite endsof' theI frame 123. The .screws 128. are of. the same pitchand are connected together tobe actuatedlinunison by a connecting shaft 129 journaledy on the main frame .57 and geared.- totheliftf ing screws 128 by bevel' gears asI shown in` the drawings, so that the frame 123 may be adjusted vertically with an equaly and/parallel movement of all' its parts. The weight of thel frame 123 and ofthe mechanisms carried thereby isv supported by the lifting: screws 128. Vertical movement of theframe 123 'is `effectedby a. groovedl pulley 130i fixed? on one end of'the connecting shaft and: en- .l

gaged by a pull rope- 131.

The jointing-saw driving shaft 122 is-arfranged to be actuated,` froml the vertical' shaft the vertical shaft 7 3, feeds the mainframe 57 longitudinallyl of the table or bed- 13.

The frame-123. carries a supporting. bracket 132', in which'is journaleda flanged sleeve-` 133 of'a bevel gear 134, which isv splined'on the vertical shaft 74', so. as1topermit actua,i

tionofthe jointingsaws v vthout-regard to the verticalV adjustment of. the jointingsaw' supporting frame 123 ont the mainY framef57.

The gear 134 engages a"loevelgear 135'` (Fig-' 4 8)V also journaled on-thebracket132, andi carrying a sprocket wheel 136 connected by` a sprocket chainA 137 with` a sprocket 138 fixed on the jointingsawdrivingqshaft122.

i l '74,'which,.as above described, together with The jointing saws are fed longitudinally of the table 13 byfeedingthe main frame 5T by the same means employed in giving a 'like' feed `movement tothe grinders 14, and described above. It is evident that the Same advantages accrue in feeding the jointing saws past a stationary work-supporting table thatare described in reference Ato the sired angularl adjustment may be effected by reason of the fact that the bolts 105 are free to slide inthe annular lf-groove, in the car-r riage 104.

The usual hand ,levers for actuating the i different clutches shown and described are drawings.

omitted for theA sake of clearness of the Provision is made for supplying water to the surface of the Vwork beneath the grinders 14. A flexible supply pipe lll is connected to distribution'pipelelh from which spouts 143 lead :down through 4the sleeves 35 to the top ends of the grinder shafts 15, which are hollow and forni pipes, so that the Water is delivered beneath the grind-ers 14.

It is obvious that various modifications may be made in the'- construction shown and above particularly described `'within the principle and scope ofmy invention.

"l claim: l

1.; A stonc'vvorlring machine comprisinga grinder movable to and from. the work. a

' lever connected with the grinder and having "armsextendiiig at opposite sides of a vertical plane iii which lies the axis ofthev lever-"s fiilerum, and a weight applicable to either arm of the lever and adjustable thereon to vary the pressure if the'gifindei' on the work.

2. A stone working machine comprising a" grinder movable to and from the worki a lever connected with `the,grindeito move the grinder 4to and from the worlniind a` cam acting on the'llever toregulale the depth of cut of the grinder.

8. A stone working machine comprising av grinder movable to and `from the work, -a lever connected with the grinder to move the grinder to and lfrom the work, a` rock shaft connected with the lever to actuate the lever, and adjustable means for limiting the movement of therock shaft to regulate the depth of cut of the grinder. l

4. A stone working machine comprising a grinder movable to and from the work, a lever connected with the grinder to move the grinder to and from the Work, a rock shaftv connected with the lever to actuate the lever, and a handle carried by the rock shaft to movethe grinder to and from the work.

5. A 'stone working machine comprising a grinder movable to and from the work, a lever connected withthe grinder to move the grinder to and from the work, a rock shaft connected with the lever toactuate the lever.

grinder on the Work, 4a rock shaft connected with the lever to actuate the lever, an armA carried by the rock shaft, and an adjustable stopin the pathof the .arni to regulate the depth of cut of theV grinder.

7. A Stone .Working machine comprising a. grinder mounted to rotate in'substantially horizontal planes -and movable. vertically relativelyto the work, means for actuating the grinder including a substantially vertical sliaft'oir which the grinder is mounted, a'lever connected with the shaft, a weight adjustable on the lever to vary the pressure .of the grinder on. the Worlv a rock shaft, a

cani carried by the rock shaft and adapted to actuate the lever, an arm'c'arried by the lrock shaft, an adjustable stop in the path `of, the arm to regulate tliedepi'h of cut 'of the grinder, andA a handle carried by the rock shaft to raise and lower the grinder relatively vto the work.

8.,A stone working machine comprising .a grinder` movable, vertically relatively to the workineans for actuating the grinder, mechanism connected with the grinder for raising and lowering the grinder. a support- ,ing frame for the grinder, a work-support -ii-ig table, means for feeding the frame and .grinder horizontally relatively to the table, and meaiiszactuated by the feeding means I and coactive with the raising and lowering mechanism to lift the grinder automatically from one piece of Work or from one part of the Work to anotherv piece or part ofthe Work. l

9. A stone working machine comprising a. grinder movable vertically relatively to the Wor'k, means for actuating the grinder,

la. lever connected with the grinder for raising and'lowering the grinder. a rock shaft connected with the lever to actuate the lever,

an arm carried by the rock shaft, a supporting frame for the grinder, a Worlcsupporting table, means for feeding the frame andgrinder horizontally relatively Vto the table,

a push r-cl. coactive with the arm lto raise the grinder clear of the work, and a lifting cam `stationary relatively. to the tableand adapted to engage the push rod to lift the grinder from one locationlon the work` to another as the frame is ted relatively to the table. l

l0, A stone working machine comprising a grinder movable vertically relatively to the work, means tor actuating vthe grinder, a lever connected with the grinder for raising and lowering the grinder, a rock shaft connected with the lever to actuate the lever, an arm carried bythe rock shaft, a supporting frame for-the grinder, a work-supporting table, means for feeding the frame and grinder horizontally relatively to the table, a push rod coactive with the arm to raise the grinder clear of the work, and a lifting ca iii stationary relatively to the table and adapted to engage the push rod to littl the grinder from onelocation on the work to another as the frame is fed -relatively to the. table, the lifting cam being adjustable to ditlerent locations relatively to the 'table to compel the grinder to belit'ted at any desired location relativelyto the work.

11. A stone working machine comprising a grinder mounted to rotate in substantially horizontal -planes and movable vertically relatively to the work, means for actuating the grinder, mechanism connected with the grinder for raising and lowering the grinder, a supporting frame for the grinder,

a worksupporting table, means for feeding the tframe and grinder horizontally relatively to the table, and a cam block station ary relatively to the table and coactive with the raising and lowering mechanism to liftthe grinder from one location on the work to another as the frame is fed relatively .to the table, such cam block being adjust-able to dife'rent locations relatively to the table to compel the lifting of the grinder to take place at any desiredv location relatively to the work.

12. A stone working machine comprising a grinder movable 4vertically relatively to the work, means for actuating the grinder, mechanism connected with the grinder for raising and lowering t-he grinder, a supporting frame for the grinder, a work-supporting table, means for feeding the frame l the table.

'1135A stone working machine comprising a support, a frame mounted to have a feed movement and a return movement relatively to the support, a nut rotatably carried by the support, ascrew also rotatably carried by the support and engaging the nut, means for rotating the nut to impart one of 'said movements to the frame', and

' means for rotating the screw to impartI the other ot said movements to the frame.

1%. 'A stone working machine comprising a support, a frame mounted to have a teed movement and' a return movement relatively to the support, a nut rotatably carried by the support, aV screwalso rotatably carried by the support and engaging the nut, means for rotating the nut to impart one of said movements-to the frame, and. means for ro-v tating the screw to impart the other of said movements to the frame, the means for ini-v part-ing the feed movement including a worm gear.

In testimony whereof I have. affixed my signature in presence of two'wit-nesses.

VILLARD F. MEYEHRS. lVitnesses:

WVM. ASHLEY KELLY, BERNARD CowEN. 

